Pilot and gas cut-off



J. GRAF, SR

'PILOT AND GAS CUT-OFF 1924 2 Sheets-Sheet l Filed Dec. 5

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' l l/ATTORNEY Aug. 18, 1925. 1,550,313

J. GRAF, SR

PILOT AND GAS CUT-OFF Filed Dec. 5, 1924 2 sheets-sheet z Inausea Aug.18.1925.

* 'juNi'rEu-jSTATES PATENT orifice'.

l, 4Joint om, sa., oiNEwYonL N.- Y.

rino'r im eascUr-orr.

Application Med Becember 5, 1924. Serial lo. 754,146. l

provements in a Pilot and Gas Cut-Oif of which the following is a full,clear, and exact specification.

This invention relates more lparticularly to a class of safety gasappliances.

My invention has for its object .primarily to provide a device wherein'is employed a pilot and gas cut-olf for Iuse especially on gas stovesand the like to. enable the heating burners to be lighted whenrdesiredfor avoiding the which is of a form adapted to cause the main a. gasstove. A sprin supply of the gas to cut-oil automatically in event ofthefilot llame being accidentally extinguish so as to ,overcomethe lia--bility of liberation of the gas in buildings and other structures withthevconsequent danger of explosions and ,tire as' well as to overcome.the danglil' of persons occupying the premises iha ous prducts. y

The invention consists essentially of a chamber or casing' having aninlet adapted ifthe poisonous) gaseto be connected to the main s/upplyof fuel.

gas, and having an outlet' adaptedto be connected to the feed pipe ofthe burners of actuated p valve -is movable inwardly `an youtwardly ofthe chamber `for admitt' d cutting-olf the low of gas, and a p1 otburner having a valve controlled pipe leads fromsthe'chamber forprovidin a flame for use to ignite 'the burners of t e stove. Above thelpilot lburner is supported a disk of mica-for beingA heated .by thea'me to cause the disk to move toward the burner, and onthe mica disk'is carried a clip adapted to be moved upwardly and downwardl withthemovements of the disk. 'A lever is fulcrumed with one of its endsmovable toward and `from the valve and so that its other eiidis`movable'. into and out of engagementwith the clip. 1'When the valve ismoved against the tensionofits spring `to open the inlet ofthe chamberfor admitting gases catch is provided f or releasably locking the valve.i When. the clip "is,

moved downwardly with 'the downwardly movement of the mica disk underthe influence of the heat of the pilot flame the lever iapositioned intoengagement with the clip,

frequent use f matches,I and meutary, of the device withits `sitions foroperation.

and the catch is also Aadapted to releasably lock the lever so that inevent of the acciting-off the ilow of gas into the chamber and tothestove for preventing accidents.

A further object of the invention is to pro- -vide a pilot and gascut-oil of a simple, eicient and durable construction which may be .madeVin appropriate sizes and shapes.

With these and other objects in view, lthe invention will be hereinaftermore fully ex- J plained with reference to the accompanying drawingsformin a part of this specification in which similar characters ofreference indicate corresponding parts in all the views, and will thenbe-pointed out in the claims at the end of the description.

In the drawings, Figure 1 isa top plan,

partly fragmentary, of o ne form o f pilot and gas,v cut-olf embodlyingmy invention. Fig. 2 is a side e Peris '1n p0- Fi 3 is an en'li ged sideelevation, partly fragigrientry and partly` broken away, ofia number'ofpai'ts o Ithe device. Fig, 4 is'an enlarged detail sectional viewtaken on the line 4-4'of 1l. Fi 5 is anenla d fragments sectional view.taken on e line 55-of 1g. 1, andf Fi .6 is an enlar fragmentarypview ofa ortion of the p otburner 'used in the device.

The device has a chamber or casing 10 evation, partly frag- I which maybe of any approtgriate size and shape, though the form'of lustrated.issubstantially 'lf-shaped to pmvide an inlet 11 in one of its ends, anoutlet 12 in its ,upper part and an opening 13 mev in its second endwhich is opposite to the inlet 11. The inlet 11 is threaded forreceiving the threaded end of .a pipe, as 14, leading-from a source ofgas supply,- and the outlet 1 2 may also beintenorly t ended forreceiving the threaded end of a pipe'as 15, Y

which may1 lead thel burnelrs o 4a lstov nots own'. Y eopemn vmaywiseebe threaded and in this open- .exterierlythreaded end ing isc1-wedde of a tubular or cylindrical member 16 hav ing itsf boreinregister with the inlet 11,

and the-inlet or the pipe 14 may be beveledV -as at 17, to provide avalve seat.

Reciprocable in the bore of the tubular member 16 isa valve 18 having ahead 19 which may be made of rubber or other suitable material, and thishead or valve is mounted on a stem 20 which is movable '1nwardly andoutwardly of the chamber 10 through the tubular member. The valve head19 is of larger diameter than the inn let 11 of the chamber, and thefree end of head 19 prot-ru es beyond the tubular member, 16. On thefree end of the exteriorly threaded part of the tubular member 16 y maybe a suitable washer 22 which surrounds the stem 20 of the valve head 19for preventing leakage of gas from the chamber through the passage ofthe tubular member. The end portion of the passage ofthe tubular member16 opposite to the chamber 10,\may be enlarged, as at 23, with its wallbeing'threaded, andy in this threaded enlarged part is screwed athreaded gasket, as 24, whlch surrounds the stem 20 of thek valve. Alsoon the gasket 24 at the adjacent end of the tubular member 16 may be nutthe receiving central part of the disk of mica is 25 for tighteningthegasket in the tubular member.

Leadin from the interior of the receivi-l ing cham r 10 is a pipe 26which termi-` nates with a burner 27 having one or a number of spacedholes therein for theI How of to provide a pilotame, as A.. Fig. 2.

f Ve pipe 26 isof a length for positioning the 'burner at a suitabledistance from the chamber 10, and interposed in the pipe may,

be a suitable cock or valve 28 which is operative for controlling thefeed of gas from `chamber tothe pilot burner 27. The pipe 26 of thepilot burner may be supported by a bracket or strap, as 29,`whichextends from the tubular member 16. On the tubular member 16 is anotherbracket or strap, as 30, which supports one end of a bar ,31.` disposed-in splaced relation to the pipe 26 of the pilot urner. The vbar 31 mayalso be fastened, at 32, to the bracket 30, and this bar is of a lengthso that, its second end terminates in proximity to the ilot burner 27.0n lthelsecond end, of

e bar 31 is carried an annular frame, e533,

' and in this frame is mounted a disk of mica,

The frame 33 isA so positioned vthat the spaced above the pilot burner27 for the de A the burner when lighted to heatuthe mica 'mie mica f Misof a .u so

Vmadera that the heat from the Rame will cause thev mica to be attractedthereto suiciehtly for the central part of the disk to move or benddownwardly or toward the pilot burner, as indicated' in dotted lines, atB, Figs. 2 and 3. On the centralpart ofthe u per face \of the mica` diskis a clip 35 whic is preferably in the form of a rod of substantiallythe .shape of an inverted L to provide a vertical armV 36 and lan arm 37disposed angularly on an inclineltoward the Jrame 33 of the disk 34. Theend of the arm 36 of the lLshaped-rod or clip 35 is ixed,.at 38, to themica disk, and the arm as 40, of a size'that whenthe'arm raises adetermined height it`,will contact with the arched part of. the strap;The beveled end 39 of the. arm 37 is geable by one (and of a lever 41for automatically operating to cause the valve 18 to o rate forcutting-od the flow of gas throng the inlet 11 should the pilot iiame Abe accidentally 'extinguished, as will be hereinafter more fullexplained.

T e lever 41 is preferably a form having a rod 42 disposed so that 'oneot its ends wi removably engage the beveled end 39 of the arm 37 of' thelrshaped rod or clip 35 when the lever is manually adj acoordingly. Theotherv endportion of the rod 42er the lever 41 is fnlcruined or pivoted,at 43, to an arm 44 which protrndee angularly from Ia. sleeve, as 45,held, at 46, to part of the bar l31 of the rame'of the mica disk 34 inproximity to the hee end of the stem 20 of the valve or head 19.Adjacent the end` of the rod 42 opposite toits pivot 43 may be a weight47 adapted to cause the rod 42 to move with a downward thrust when therod is disengaged from .the L-shaped rod or clip 35, and part of theother end of ,the rod 42 rotrudes some distance, as at 48, beyond thepivot 43.

Potruding from the fixed sleeve adjacent the arm 44 is a lug 49 to thefree end of which is pivoted, at 50, a catch, as 51, for releasablylocking the lever when engging the clip or L-shaped rod 45 and forasably lookin the valve 18 in o talon from the et 11 of the receiving camber 10; The catch 51 is preferably in the form of a block or short bar52 ha 'imputer end portion cnt away or notched ngthwise, as at 5 3 toprovide a tooth orlng, as 54. fra@ am te or @anni is en a te anderevswimg'laterally from the sleeve 45 over7theprotruding 41,- and thetoothed bar is ofa. length as well as bein lpositionedfor -releasablyen-` gaging a colar or annular. flange, as 55,

end 48 of the rod 42 ofthe lever g which is rovided on the stem 20 ofthe valve hea 19. To the bar 31 in spaced relation to theesleeve 45 ofthe Akcatch 51 is securedfat 56, one end of a bracket arm 57 having initsother end anopening through 4Jwhich the stem'20 o the valve head is.dispod. (Bn the valve stein 20 in spaced rela' tion tothe bracket arm`5T is held a Collar 58, and encircling the valve stem between the collar58 and bracket arm 57is a spiral spring 5 9 tensined9 for normallyserving to .e force the stemfin-a direction inwardly of the receivingchamber 10- for yieldin lyclosing the inlet 11 of the receiving cham ragainst the admission of'gas.

Wh'en the device is in use it iisfoperated byadjustably moving the stemof-the .valve 18 voutwardly, of the receivingham ber 10 against thetension ofthe spring 59 for unseating the valve head 19 to allow gas toflow into the receiving `chamber'. The

` lever 41 is moved for -positionin its rod 42.

into engagement with the bevele .end 39 of' 36 the cli'p or l -shapedIfod-35, When the stem 20 of the valve 18 is moved 'so that its collar55 is alongside the protruding end 48 of the rod 42 vofV the leverthe'catch orblock 51 is swung .over the protnudingend 48 of the rod 42,andthe tooth 54 of the catch is ing the clip or k-shaped moved intoDengagement with the' collar 55 of the stem. 20. The valve 18 then willbe rele'msably locked in open ,position from the inlet of the receivingchamber and tliue lever will be releasably held to the clip 35. Withthelocking of these parts the,"A ilot burner 27 is lighted, l"and theflame A vo; the burner will heat the disk 34 of mica for causing thedisk to bend sufficiently, as at B, 'forholdrod 35 in downward positionwith the lever'41` still' in engagement 4with the arr 37 of the clip. In

- event of. accidental extinguishing of the pilot ilame'the 4mica ldiskwill rapidly cool and reversely move to its norma position.

TheA clip or L-shapedrod `35 willilikewiseY m'ove'upwardly`r and theengagement of its arm '31 with the lever 41/.wi11 be severed.

The lever will then automatically swing downward, 'and its protrudingend 48 will move upwardly totalise the catch 51 tobe freed from .itsengagement with the"collar -55 of the stem 20 of Ithe valve 18.` Thetengas su pl sion of the spring 59 will move the stem inwardly of thereceiving chamber for also movmgthe valve head 19 on the inlet 11 of thereceiving chamber -to cut-oil' the flow of description, I'have embodiedthe preferred form ofmy inventiom.

but I do not to understood as limitflever when engagingthe clip.

ing myself thereto as I am awarethat modi-` andV outwardly -of thechamber, a' pilot burner on the chamber, a disk of mica s'upported abovethe burner for being heated- 'b v the flame othe pilot burner to causethe disk to move toward the burner, a clip carried bythe mica disk forbeing moved upwardly and downwardly with movements of the mica disk, alever fulcrumed with one of itsends -movable toward and from the valveand the other end of the lever mov- `able into' and outof engagementwith the cli l and a catchl supported `for releasably gf-the valve when`moved against `the `spring controlled valve Jmovable inwardly tensionof its spring to open the inlet of 'the chambenand also tobereleasablyen gaged by the lever when engaging the clip.

2. `A..pilot and gas cut-oli', comprising a chamber having an inletandan outlet, a stem movable inwardly and outwardly of the chamber, avalve on the stem within the chamber for opening and closing the inletwith movement of the stem inv thechamber,

a spring on thestem for normallyrforcing the stem and its valveyieldingly to Aclosed iositionl on the inlet of the chamber, a piloturner leading *from the chamber, a disk o mica supported above theburner for being heated by Athe. flame of the pilot burner to cause thedisk lto move toward the burner,

' a clip carried by the mica diskfor being moved upwardly anddownwardlywith the movements of ,the mica disk, a lever fulcrumed withone of its ends movable toward and fromJ the stem of the valve and theother end of the lever movable into` and out of-en gagement with theclip, and a Ycatch supported for releasably locking thestem and tlevalve when moved against the tension of the spring to open the inlet' ofthe chamber and also to be releasably engaged by the 3. A pilotandg'asfcut-oif, comprising a chamber having an inlet and an outlet, a

tubular member leading into the chamber -opposite to the inlet,l a stemymovable yin the tubular member, a, valveon the st em within the`chamber or'opening and closmg the 1nlet with'- movement of the steminwardlylll 'and outwardly lofthe chamber, a spring on the stem fornormally forcing the stem and its" valve yieldingly to closed vpositionon theinlet o f the chamber, a pilot burner having a valve controlledpipe leading lfrom the toward thefburner, a clip carried by the micadisk )for being moved upwardly and downwardly with the movements of themica disk, a lever fulcrumed with one of its ends movabletoward and fromthe stem of the valve and the other end of the 'lever `movable -into`and out of engagement with vthe clip, and a catch supported forreleasably'locking the stemand the valve when moved against the tensionot the spring to open the inlet-oi` the chamber and also to be.releasably engaged `by leverA lwhen engaging 4. A pilot and gas cut-od,comprising a chamber havin an inlet and an outlet, a Stem movableinwardly and outwardly of the chamber, a valve on the stem within thechamber for opening and closing-'the inlet withmovement of the stem inthe chamber, a spring on the stem for normally forcing the stem and itsvalve 'yieldingly to closed sition'on the inletofthe chamber, a piloturner having a valve controlled pipe lead-A ing from the chamber, a barsupported on the tubular member and disposed in spaced relation to thepipe of the pilot burner, a.

. disk'of mica supported by the bar for being heated by the llame of thepilot burner to cause the disk to move toward the burner, a clip carriedby the mica dlsk for. being moved upwardly and downwardly with themovements of the mica disk, a lever fulerumed to the bar with one of itsends movable toward and from the stem of the valve 'andthe other end ofthe lever movable into and out of engagement with the clip, and a icatchon the bar for releasably locking the chamber having ^an inlet and anoutlet, a

` tubular member leading into the chamber opposite to the inlet, a stemmovable in the tubular member, a valve on the stem within the chamberfor opening and closing the in let with movement of thestem inwardly andoutwardly of the chamber, a springon the stem` for normally forcing thestem and its valve yieldingly to closed position on the inlet of thechamber, a pilot burnerhavmg a valve -controlled pipe leading from the Ychamber, an annular frame supported above the ilot burner, a. diskl ofmica in the frameA for ing yheated by the flame of the pilot burner tocause the disk to move toward the burner, a. cli carried by the micadisk for move upwardly and downwardly with one of its ends movable.

tubular member, a valve' on the stem within the chamber for openingandqclosing the inlet with movement of the stem inwardly and outwardlyof the chamber, a springon the stemfor normally forcing the stem and itsvalve yieldingly to closed position on'the`inlet of the chamber, a pilotburner having a valve controlled pipe leading from the chamber, a barsupported on the tubular member and disposed in spaced relation to thepipe of the pilot burner, an annular frame on the bar above the pilotburner, a

disk of mica in the frame for being heated by the flame of the pilotburner to cause the disk to move toward the burner, a clip carried bythe mica disk for being moved up-v wardly and downwardly with themovements vof the mica disk, a lever fulcrumed to the bar with one ofthe ends ofthe lever movable toward and from the stem of the valve andthe other end of the lever movable into and out of'engagement with theclip, a weight on the second end of the lever, and a. catch on the barfor releasably locking the stem and the valve when Imoved against thetension of the spring to open the inletL of the chamber and also to bereleasably engaged by the lever when engaging the clip.

7. A pilot and gas `cut-off, comprising a chamber having an inlet and anoutlet, a spring controlled valve ymovable 'inwardly and outwardly ofthe chamber, a pilot burner on the chamber, a disk of mica supportedabove the burner for being heated by the flame of the pilot burner tocause the disk to move toward the burner, a substantially L-shaped rodhaving the end of one of its arms fixed to the disk of mica with itsother arm disposed toward said valve and the free end ofthe second armof the L-shaped rod being beveled, a lever fulcrumed with one of itsends movable toward and from the valve and the other` end ofthe levermovable into andl out of engagement with the `beveled end of the`L-shaped rod, and a catch supported for releasably locking the valvewhen moved against the tension of its spring to open the inlet'of therchamber and also to be releasably engaged by the. lever when en-u.gagillg the L-shaped rod. with the movements of the mica disk, a leveri `8.k A pilot and gas cut-off compri a. chamber an inlet end an oulgt aillet with movementv of the stem in the 'chamber, a spring on the stem`for nor- '.mally forcing the stem and its valve yieldinglyto closedposition on the inlet of the chamber; 'a pilot burner leading from thechamber, a disk of mica supported above the biirner `for being heated bythe flame of the pilot burner to cause the disk to Lmove toward theburner, a substantially L- shapedv rod having the nd of one of its armsixed to the disk'l of mica with its other arm disposed toward the stemof said valve and the free end of the second arm fulcrumed with one ofits ends movable toward and fromthe'stem of the valve and the other endof the lever movable into and out of engagement with the beveled end offtu and also to` be releasably -the L-shaped rod. and a catch supportedfor releasably loe when moved against the tension' of the' ng the stemand valve the inlet of the chamber engaged by the -shaped rod.-

spring to open lever when enga gthe 9-A pilot and.m chamber havinganinlet and an outlet, a tubular member leading into thechamber oplpos'itto the inlet, a stem movable in the ular member,

inlet with movement of the stem inwardly and outwardly of the chamber, aspring on the stem for normally forcing the stem and its valveyieldingly to closed .position ,on the inlet of the chamber, a pilotburner having a valve controlled pipe leading from the chamber, a diskofrmica supported above :the burner 'for being heated b i the llame ofthe pilot burner to cause he disk to move toward the burner, asubstantiall L- shaped rod having the end of one o its arms fixed to thedisk of 'micawith its other arm disposed toward the stem of said -valveand thefree end ofthe second'arm c of the L-ehaped rod being beveled, alever ulcrumed (with one of .its ends movable toward and from the stemof the valve and the other end of the lever movable into and out of lement with the beveled end of the L-sha rod, and a catch on the bar forreleasably locking the stem and the valve when moved against the tensionof thefspring to open the inlet of the chamber and also to be releasablyengaged b the lever when engaging the L-shaped Aro l'10, A pilot an avchamber having an .inlet and an outlet a stem movable inwardly andoutwardly o the chamber, a valve` on the stem within the chamberforopening andi -closing the inlet- 'with movement o the stem in thechamber a spring on the. stem for-normally `shaped ro gas cut-oil,comprising a.

x a valve on the stem within; the chamber for opening and closing thegas cut-oil', comprising` l chamber having an inlet and an outlet, a

disposed in spaced relationto the pipe of the pilot burner, a disk ofmica supported by the bar for being heated by the llame of` l the pilotburner to cause the disk to move toward the, burner, a substantiallyrL-shaped rod havino` the end of one of its arms fixed to the disk ofmica with its other arm'disposed toward the stem of said valveand thefree end of the second arm of the L'- shaped ,"rod being beveled,n alever fulthe, lever movable toward and from the stem of thevalve and theother end of the'leven movableinto and out of engagementwith the beveledend of the L-shaped rod, and a catchon the bar for releasably lockingthe stem and the valve when moved lagainst the tension of the spring toopen the inlet of the chamber and also to be releasably engaged br thelever when engaging the L- 11. A pilot and gas cut-olf, comprising achamber h'avingan inlet and an outlet, a tubular member leadinginto thechamberl opposite to the inlet, a stem movable in the p a crumed to thebar with'one of the ends of of the L-shaped rod being beveled, a levertubular member, a valve on the stem within thechamber for opening andclosing the inlet with movement ofthe stem inwardly i and outwardly ofthe chamber a spring on the `stem for normally forcing the stem and its'valve yieldingly to closed position on'4 the inlet of the chamber, a

pilot yburner Vhaving a valve `controlled v pipe leading from thechamber, an an- 1 nular.. frame supported above the pilot burner,v adisk of mica in the frame for being heatedV b the llame of the ilotburner to cause the isk to move towar the burner, a substantiallyL-shaped rod having the end of one of its arms tixedto the disk ofmicawith its other arm dis sed toward the stem of said valve and the ee endof the second arm of the L-shaped rod being beveled, 'a' lever fulcrumedwith one of its ends movable toward and from the stem of the valve andthe other end of the lever movable into and out of enga ment. with thebeveled end of the L-shape rod, and' a catch 'on the valve when movedagainst the tension of the spring to open the inlet ofthe chamber andalso to be releasably engagedb1 the n n lever when engaing the L-shapedro 12. A pilot an gas cutoff, comprising a lbar for releasably locking.the stem and the KGV.

i and outwardly of the.y chamber a spring on the stem for normallyforcing the stem and its valve yieldingly to closed position/gon theinlet of the chamber, a pilot burner having a valve. controlled pipeleading from the chamber, a barv supported on the tubular member anddisposed in spaced relation to the pipe ofvthe pilot burner, an annularframe on the bar above the pilot burner, a disk of mica in the frame forbeing heated by the flame of the pilot burner to cause lthe disk to movetoward the burner, a sub- 1 stantially L-shaped rod( having the end ofone of its arms fixed to the disk of micav with its other arm disposedtoward the stem of said valve `and the free end of the second arm ofthe'LLshaped rod being beveled, a lever fulcrumed to the .bar with oneof the ends of the level` movable toward and from the stem of the valveand the other end of the lever-movable into and out of engagement withthe beveled end of the L- shaped rod, a weight on the second end of thelever, and a catch on the bar for releasably locking `the stemand thevalve when moved against the tension of `the spring to open the inletofthe chamber and also to be releasably engaged by the lever when engagingthe L-shaped rod.

This specification signed this 4th day of December, A. D. 1924.

JOHN GRAF, sie

